Ajax| Code | questions | chinese
Problem encountered: When using XHR to issue a request, the requested URL in the parameter with Chinese, then in the background parsing request can not be Chinese
Such as:
Request = new ActiveXObject ("Microsoft.XMLHTTP");
Request.open ("get", url); My URL needs to have Chinese parameters
The direct plus parameter is not resolved in the background, so I use the method to encode the URL to convert
Transfer code before the Chinese parameter is passed in the page:
function EnCode (CHINESESTR) {
Return Escape (chinesestr, ' utf-8 ');
}
To generate a URL using a string that has been turned into a horse
And then we're going to decode it backstage.
Think you can not directly from request to get the encoded string, so use the method to remove the URL, and then remove the parameters of the URL to decode
Remove URL, and take parameter method
String xxx= Geturlparameter (unescape (request.getquerystring ()), "XXX");
XXX So obtained is the correct Chinese after decoding
public string Geturlparameter (string str,string targetstr) {
string[] Stringarray = Str.split ("&");
for (int i=0;i<stringarray.length;i++) {
if (Stringarray[i].startswith (TARGETSTR)) {
Stringarray=stringarray[i].split ("=");
Break
}
}
return stringarray[1];
}
Decoding method
The following is the decoding of JS escape
Private final static byte[] val = {0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F,
0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F,
0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F,
0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F,
0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x00, 0x01,
0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x3F, 0x3F, 0x3F,
0x3F, 0x3F, 0x3F, 0x3F, 0x0A, 0x0b, 0x0C, 0x0D, 0x0e, 0x0f, 0x3F,
0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F,
0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F,
0x3F, 0x3F, 0x3F, 0x0A, 0x0b, 0x0C, 0x0D, 0x0e, 0x0f, 0x3F, 0x3F,
0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F,
0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F,
0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F,
0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F,
0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F,
0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F,
0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F,
0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F,
0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F,
0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F,
0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F,
0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F,
0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F,
0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F};
/**
* Decoding instructions: This method ensures that the correct "decoding" result can be obtained regardless of whether the parameter S is encoded by Escape ().
*
* @param s
* @return
*/
public static string unescape (string s) {
StringBuffer sbuf = new StringBuffer ();
int i = 0;
int len = S.length ();
while (I < Len) {
int ch = S.charat (i);
if (' A ' <= ch && ch <= ' Z ') {//' a ' ... ' Z ': as it was
Sbuf.append ((char) ch);
else if (' A ' <= ch && ch <= ' z ') {//' a ' ... ') Z ': as it was
Sbuf.append ((char) ch);
else if (' 0 ' <= ch && ch <= ' 9 ') {//' 0 ' ... ') 9 ': as it was
Sbuf.append ((char) ch);
else if (ch = = '-' | | ch = = ' _ '//Unreserved:as it was
|| ch = = '. ' | | CH = = '! ' | | ch = = ' ~ ' | | CH = = ' * '
|| ch = = ' \ ' | | ch = = ' (' | | | ch = = ') ') {
Sbuf.append ((char) ch);
else if (ch = = '% ') {
int cint = 0;
if (' U '!= s.charat (i + 1)) {//%xx:map to ASCII (XX)
CInt = (CInt << 4) | Val[s.charat (i + 1)];
CInt = (CInt << 4) | Val[s.charat (i + 2)];
i + 2;
else {//%uxxxx:map to Unicode (XXXX)
CInt = (CInt << 4) | Val[s.charat (i + 2)];
CInt = (CInt << 4) | Val[s.charat (i + 3)];
CInt = (CInt << 4) | Val[s.charat (i + 4)];
CInt = (CInt << 4) | Val[s.charat (i + 5)];
i + 5;
}
Sbuf.append ((char) cint);
else {//the corresponding character is not encoded
Sbuf.append ((char) ch);
}
i++;
}
return sbuf.tostring ();
}
The Exfirstword is the correct Chinese.
Problem solving
When a request is made using XHR, an HTTP package is actually sent to the background, except that the HTTP package is encapsulated XMLHttpRequest, and XMLHttpRequest is encoded in Chinese gb2312 so that because the page is UTF-8 encoded, So there will be problems in the background.
So if your page is GBK or gb2312 encoded, you're not going to have a lot of trouble with XMLHttpRequest.
